Granollers saved all six break points. He will next play Horacio Zeballos of Argentina, who beat Martin Fischer of Austria 7-5, 1-6, 6-3.

Leonardo Mayer of Argentina defeated Kenny De Schepper of France 6-4, 6-4 to set up a second-round match against top-seeded Philipp Kohlschreiber of Germany.

Dominic Thiem rallied from 4-1 down in the second set to beat Andrey Kuznetsov of Russia 6-2, 7-5. It was the first ATP match this season for the 268th-ranked Thiem because of a viral illness. He will play fourth-seeded Jurgen Melzer in an all-Austrian clash.